NEWSLETTER ARTICLES

Strawberries, Soils and Water


From our Central Coast Agriculture Highlights newsletter
August 1998 issue:

NEW CAPORAL LABEL FOR CELERY

by Warren Bendixen

The Caporal 4L (Prometryn) label will be expanded to cover application on pre-transplant celery as a result of five research trials I conducted on Betteravia Farms in cooperation with Craig Reade, Betteravia Farms, and Jake Zacaria, Novartia, during the spring and summer of 1997.

The 24C label expansion submitted by Novartis Crop Protection, Inc. is expected to clear around the middle of August.

The previous label for transplant celery restricted application to the 2-6 week-period after transplanting and before the weeds are 2 inches tall. Weeds frequently competed with the celery transplants during this delayed applications and required more handlabor to weed the fields.

The pre-transplant applications showed a high degree of crop safety and equal celery yields to the post-transplant applications.

Broadleaf weeds, including common lamb’s-quarters, nettleleaf goosefoot, redroot pigweed, malva, shepherd’s-purse, and small nettle were all effectively controlled with the pre-transplant applications equal to, or better, than the post-transplant applications.

The results of 3 of the 5 trials are shown in the following tables:

CAPORAL TRIALS
AreaVarietyTransplanting DateTransplant Pre-application DateTransplant Post-application Date
Santa Maria Field 1522Pybas 5275
3/21/97
3/19/97
4/17/97
Santa Maria Field 1522Pybas 5275
4/22/97
4/20/97
5/20/97
Oso Flaco Field 4704Pybas 5275
5/2/97
4/30/97
5/22/97

Field 2501 - Santa Maria
Transplanting Date - 3/21/97; Evaluation Date: 4/25/97; Celery 4-5" and 8-12 leaves

TreatmentCommon Malva Control (%)Common Purslane Control
(%)
Phytotoxicity
(%)
Yields Tons/acre
Check
0
0
0
97.06
PRE (2 pts)
97
97
0
97.64
PRE (4 pts)
99.75
99.75
0
99.36
Post (2 pts)
99.25
99.25
0
98.13
PRE (2 pts)+Post (2 pts)
99.25
99.25
12.5
101.47

Field 1522 - Santa Maria
Transplanting Date: 4/22/97; Evaluation Date: 5/7/97; Celery 6-8" and 12-14 leaves

TreatmentCommon Malva Control (%)Common Purslane Control
(%)
Phytotoxicity
(%)
Yields Tons/acre
Check
0
0
0
81.30
PRE (2 pts)
97.6
98.3
0
82.97
PRE (4 pts)
98.75
99.75
0
82.83
Post (2 pts)
99.5
99.25
12.5
82.57
PRE (2 pts)+Post (2 pts)
100
100
11.25
79.25

Field 4704 - Oso Flaco
Transplanting Date: 5/2/97; Evaluation Date: 5/30/97; Celery 4-6" and 12-14 leaves

TreatmentShepherd's-Purse Control (%)Hairy Nightshade Control
(%)
Phytotoxicity
(%)
Yield Tons/acre
Check
0
0
0
70.72
PRE (2 pts)
95.75
98.75
0
75.64
PRE (4 pts)

100

99.75
0
74.17
Post (2 pts)
100
99
0
70.68
PRE (2 pts)+Post (2 pts)
98
99
0
73.00

To get on our mailing list for Central Coast Agriculture Highlights e-mail your name and address


Back to Strawberry Page